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Predicate | Object |
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rdf:type | |
lifeskim:mentions |
umls-concept:C0006549,
umls-concept:C0018220,
umls-concept:C0021469,
umls-concept:C0025991,
umls-concept:C0026549,
umls-concept:C0034693,
umls-concept:C0034721,
umls-concept:C0205219,
umls-concept:C0228575,
umls-concept:C0441655,
umls-concept:C0521390,
umls-concept:C0871261,
umls-concept:C1280500,
umls-concept:C1704632,
umls-concept:C1706817,
umls-concept:C2587213,
umls-concept:C2911692
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pubmed:dateCreated |
1984-3-2
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pubmed:abstractText |
Recording were made for dorsal horn convergent neurones with hindpaw receptive fields. Response to C-fibre activation was conditioned by noxious heat (52 degrees C) applied to the tail, this resulting in profound inhibition (Diffuse Noxious Inhibitory Controls - DNIC). The microinjection of 5 micrograms morphine into the medioventral PAG, including the n. raphé dorsalis, consistently reduced DNIC without affecting the unconditioned C-fibre responses; more lateral injections had no clear effects. Including a further study in which 20 micrograms morphine was microinjected within various PAG sites, C-fibre responses were found to be unaltered (21/51) enhanced (16/51) or reduced (4/51) with no consistent anatomical basis. The results imply that supraspinal morphine can reduce descending inhibitions and this may contribute to the consequent analgesia.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical | |
pubmed:status |
MEDLINE
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pubmed:issn |
0024-3205
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
33 Suppl 1
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
549-52
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pubmed:dateRevised |
2008-11-21
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pubmed:meshHeading |
pubmed-meshheading:6664236-Animals,
pubmed-meshheading:6664236-Hot Temperature,
pubmed-meshheading:6664236-Male,
pubmed-meshheading:6664236-Microinjections,
pubmed-meshheading:6664236-Morphine,
pubmed-meshheading:6664236-Neurons,
pubmed-meshheading:6664236-Nociceptors,
pubmed-meshheading:6664236-Periaqueductal Gray,
pubmed-meshheading:6664236-Rats
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pubmed:year |
1983
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pubmed:articleTitle |
Morphine microinjections into periaqueductal grey matter of the rat: effects on dorsal horn neuronal responses to C-fibre activity and diffuse noxious inhibitory controls.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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